/*
 * Copyright 2011-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.lettuce.core;

import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;


/**
 * Close Events Facility. Can register/unregister CloseListener and fire a closed event to all registered listeners.
 *
 * @author Mark Paluch
 * @since 3.0
 */
class CloseEvents {

    private Set<CloseListener> listeners = ConcurrentHashMap.newKeySet();

    public void fireEventClosed(Object resource) {
        for (CloseListener listener : listeners) {
            listener.resourceClosed(resource);
        }
    }

    public void addListener(CloseListener listener) {
        listeners.add(listener);
    }

    interface CloseListener {
        void resourceClosed(Object resource);
    }
}
